Actually, it's View Dependencies, View Asset Versions can be used to update an asset to a new version.
I have also found a quick way to download missing dependencies is to drag the asset itself from the main list into the Download Helper panel - Content Manager will automatically work out what dependencies it needs to download (sometimes, it will even pick up the unknown ones). You then just need to click Start. (Don't worry if the size figure at the top is high - the size will include already downloaded assets, but Content Manager will only download assets not already on the system)
Shane